Question

Largest heart is found in
A. Elephant
B. Giraffe
C. Crocodile
D. Lions
E. Blue whale

Answer 1

Hint: A heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. It is the major circulatory organ that contracts and relaxes to distribute the blood all through the body. The pumped blood carries oxygen and nutrients to the body while carrying metabolic waste such as carbon dioxide to the lungs.

Complete Answer:
The blue whale is the largest animal to have lived, reaching a maximum confirmed length of 29.9 meters (98 feet) and weight of 173 tonnes. A blue whale’s heart is about five feet long, four feet wide, and five feet tall. It weighs about 400 pounds. African elephants are the largest terrestrial creatures on earth. Their round-shaped heart weighs about 30 pounds. A blue whale’s heart weighs about 14 times as much as an elephant’s heart. The heart makes up about 5 percent of an elephant’s weight.

So the correct answer is option ‘E’ i.e Blue whale.

Additional information: A blue whale’s heartbeat slows dramatically during dives to over 1000 feet while when the whale comes on the surface to breathe, its heart gets raced to 25-37 beats a minute. Scientists think that a whale’s heart works close to physical limits and cannot beat faster, which is why whales have reached their largest size possible. The most interesting fact is that a blue whale’s heartbeat can be detected from two miles away.

Note: It’s estimated that the blue whale’s super-sized heart can pump around 58 gallons (220 liters) of blood around the body with each heartbeat.